Metal-bending machine



(No Model.) 2 Sheets-Sheet 1.

J. O. CHAPMAN.

METAL BENDING MACHINE.

No. 350,115. F Patented 0011.5,1886.

WITNEEEIEE.

' 2 Sheets-Sheet 2 (No Model.)

J. C. CHAPMAN.

METAL BENDING MACHINE.

No. 350,115. Patented Oct. 5, 1886.

UNITED STATES ATENT Erica.

JOHN ('3. HAPMAN, OF BOSTON, MASSAOIIUSETTR.

METAL-SENDING MACHINE.

SPECIFICATION forming part of Letters Patent. N0.350,1l5, dated October 5, 1886. Application tiled March 20, 1880. Serial No. 106,022. (No model.)

To aZZ whom, it may concern.-

Be it known that I, JoHx O. CHAPMAN, a citizen ol' the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvementsin Metal-Bending Machines, of which the following is a specification.

My invention has for its object to improve the supporting trusses of that class ot'1netalbending machines in which long rollers are used; also to provide a means for sustaining the upper roll 01' the set when one end of the same is not supported by its journal-box; also to so construct the machine that the housing that supports one of the journal-boxes ot' the upper roll may be swung outwardly, and thus leave the upper roll and its journal-box suspended above and free from the lower rolls; also in hanging the journatboxes of two of the rolls on swinging links, so that although the rolls maybe adjusted .in relation to each other, still their gears will engage with each other accurately on their pitch-lines, also to adapt to the journal-boxes oscillating sockcted steps for the adjusting set-screws; also to provide the upper roll with the supplemental journalpin and a device [or holding said pin. I attain these objects bythe mechanism shown in the accompanying drawings, in which Figure 1 is a view of my machine, partly in elevation and partlyin section. The end shown in section for convenience i. call the arm end, while the end shown in elevation I call the drivingend. Fig. 2 is an elevation ot'the driving end of the machine. Fig. 3 is an elevation 01' the arm end of the machine. Fig. I is an elevation of the arm end of the machine, the arm being represented as swung off so as to leave one end ot' the upper roll tree. Fig. 5 is a view showing my machine in horizontal section, taken on lines-.3 of Fig. 1. Fig. (i is a cross vertical section taken on line as x of Fig. 1. Fig. 7 is a cross vertical section taken on line y 1 of Fig. 1. Fig. 8 shows a plan View of the gear end of the machine. Fig. 5) is a detail vertical section. Fig. 10 is a horizontal section taken on a line, 0 o, ot'Fig. 6.

My present invention is an improvement on. a machine for which Letters Patent of the United States were granted to me March 9, 1875, No. 160,6t7, subject. Improvement in Metal-Bending Machines.

In all the drawings, A A represents the end parts ol' the l'rame ol'ihe machine, these parts being held together by the tie-rods I I In this machine three rolls are used, namely, two lower ones, 0 and c, and an upper one, a. The ends of the upper roll, a, and ot the lower roll I) arev hung on swinging links 1' and 1, Figs. -.L and 7, the linksfj" that hold the endsot'the upper roll being pivoted in lixcd bearings, Figs. 6 and 7, said bearings being concentric with the reversinggear 71, Fig. 2, so that although the upper roll, a, may be raised or lowered, its gear a", Fig. 2, will still properly engage with the reversinggear a. The gear a beingonafixedbearing engages properly with the gear m, which in its turn is driven by the gear 0" on the lower roll c.

0, Fig. 2, is the drivinggmr, and operates all the others. The lowcr roll. I) is hung on linksfj", Figs. 7 and 8, one at each end, said links swinging on fixed bearings, Figs. 2 and 7, which are concentric with the driving-gear 0, Fig. 2, so that although the roll I) may be adjusted its gear I) will alwaysmesh properly with the drivinggear o.

The two adjustable rolls are hung in sliding boxes, all of which are substantially like those shown at o, Figs. 1, 2, (3, 7, and 10, the cross-section of each beingsimilar to the crosssection shown in Fig. 10that is, each box is arranged to slide on the frame A. The ways, as indicated at of, Fig. 10, lit loosely so that the boxes have considerable play and may adjust themselves to accommodate the bodily movement or their respective rolls on the swinging link. As these boxes are moved by the screws (2 (I, which are rigid in the frame A, I arrange for their motion while adjust 7 ing the rolls by putting an oscillating step, e, Figs. '7 and 9, for the lower enlarged end of the screw to operate in, there being a space at the upper part ol the box for the neck of the screw to swing in, so that in lowering or li'lt ing the boxes in the act of adjusling the. rolls the said boxes can swing as .much as may be desired in accommodating themselves to the movement of the rolls.

To prevent the rolls from springing I truss each one with rods, as indicated at a Fig. 1. These trussrods are connected at each end to the journal-boxes for the adjustable rolls a and b, but the truss-rod belonging to the fixed roll 0, Figs. 2 and 3, is fastened directly to the frame of the machine, as shown. As the two adjustable rolls a and I) are prevented from springing by the same means, I will describe one, a, only. The rod (0 is connected at its ends to the boxes a, and as the boxes move with the roll and to the desired extent independently of the frame of the machine and embrace the saddle-pieces a a a", as well as the boxes aa, which they are buttressed against, it will be readily understood that the adjustable rolls with the re-enforcing partsviz. ,rods and saddles-are to a certain extent independent of. the frame, and in this respect differ from the similar parts described in my former patent, already referred to.

The rod h, Figs. 1, 6, and 9, serves to assist in holding the roll a suspended when the arm or frame A is swung off, and is fastened at one end to the projection h on the box a, Fig. 9, and at its other end to the projection a of the saddle a. The parts a", a and a of the saddles are not connected, but form with each other what maybe termed buttress-joints, and as the extreme ends of a and a rest against the boxes a, and as the said boxes a a. are held firmly by the rod ((7 thewhole combination viz., box a, saddles a a cf, and box e-is clamped together longitudinally with a lateral pressure on the middle saddle, (6.

To facilitate taking out theplates when bent, I

from between the rolls, I have the following device, particularly shown in Figs. 8, 4, and. 5, in which A represents a supplemental frame, which is pivoted-t0 the main frame A by the bolt A, and is held at its other end by the bolt Aflwhich engages with a slot, asshown in Fig. 5. This swinging frame A has upon it the screw d, which, when in place, adapts and holds the journal-boxa in position. The journal-box a, referred to, does not swing out with the frame A, but is left and heldin position by the rod a, as has been stated.

To assist in holding the free end of the roll a in place I use a pin, 9, Figs. 1 and 5. This pin g enters a hole made" inthe end of the roll a, as shown, and, as in a working-machine it is quite heavy, I support it by a compound lever, K K", Figs. 3 and 4. This lever consists of a main part, K, holding the pin hung on a pivot, K, Fig. 3, and a manipulating-lever, K", said lever K being hung on pivot K, andaeting cam-like in a slot made in the outer end of the lever K, as shown in Fig. 3. By moving the lever K the lever K that holds the pin {1 can be moved, so that the pin 9 maybe raised or lowered as may be desired, in order to place it in the end of the roll a for the purpose of assisting in holding the roll a in place while the machine is bending a plate.

I claim 1. In a metal-bending machine, the'combination of the roll a, rod a and saddles a a with the boxes e a, all arranged to operate together, substantially as described and for the purpose set forth.

2. In a metal-bending machine, the combination of the roll a, rod a, saddles'a M a, and rod h with the boxes a a, all arranged substantially EISzLlGSCl'lbOd, and for the purpose set forth. 7

3. In a metal-bending machine, the combination of therollsa I) c and the swinging frame A with thecompound lever K K and pin g, substantially as described, and for the purpose set forth.

In testimony whereofI have signed my name to this specification, in the presence of twosubscribing witnesses, on this 17th day of Marhh, A. D. 1886.

JOHN o. CHAPMAN.

\Vitnesses:

WM. B. S. GAY, Class. H. Foes. 

